We share an inbox on a team, and I noticed when I go into the sent folder they're deleted. I just started this job a month ago, and it's really annoying me because I've really tried to be nice to her and be friendly, but I noticed this weird thing. I've started documenting just in case, but it sucks because I was really excited about this job (it was my dream job). Maybe I'm misunderstanding. But why would she do this?